//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
-/// @file This file contains the declarations for the subclasses of Constant,
+/// @file
+/// This file contains the declarations for the subclasses of Constant,
/// which represent the different flavors of constant values that live in LLVM.
/// Note that Constants are immutable (once created they never change) and are
/// fully shared by structural equivalence. This means that two structurally
#include "llvm/Constant.h"
#include "llvm/Type.h"
+#include "llvm/OperandTraits.h"
#include "llvm/ADT/APInt.h"
+#include "llvm/ADT/APFloat.h"
+#include "llvm/ADT/SmallVector.h"
namespace llvm {
/// @brief Class for constant integers.
class ConstantInt : public Constant {
static ConstantInt *TheTrueVal, *TheFalseVal;
+ void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
ConstantInt(const ConstantInt &); // DO NOT IMPLEMENT
ConstantInt(const IntegerType *Ty, const APInt& V);
APInt Val;
+protected:
+ // allocate space for exactly zero operands
+ void *operator new(size_t s) {
+ return User::operator new(s, 0);
+ }
public:
/// Return the constant as an APInt value reference. This allows clients to
/// obtain a copy of the value, with all its precision in tact.
}
/// Return the constant as a 64-bit integer value after it has been sign
- /// sign extended as appropriate for the type of this constant. Note that
+ /// extended as appropriate for the type of this constant. Note that
/// this method can assert if the value does not fit in 64 bits.
/// @deprecated
/// @brief Return the sign extended value.
return Val.getActiveBits() > 64 || Val.getZExtValue() >= Num;
}
- /// @returns the 64-bit value of this constant if its active bits number is
- /// not greater than 64, otherwise, just return the given uint64_t number.
- /// @brief Get the constant's value if possible.
+ /// getLimitedValue - If the value is smaller than the specified limit,
+ /// return it, otherwise return the limit value. This causes the value
+ /// to saturate to the limit.
+ /// @returns the min of the value of the constant and the specified value
+ /// @brief Get the constant's value with a saturation limit
uint64_t getLimitedValue(uint64_t Limit = ~0ULL) const {
return Val.getLimitedValue(Limit);
}
/// ConstantFP - Floating Point Values [float, double]
///
class ConstantFP : public Constant {
- double Val;
+ APFloat Val;
+ void *operator new(size_t, unsigned);// DO NOT IMPLEMENT
ConstantFP(const ConstantFP &); // DO NOT IMPLEMENT
protected:
- ConstantFP(const Type *Ty, double V);
+ ConstantFP(const Type *Ty, const APFloat& V);
+protected:
+ // allocate space for exactly zero operands
+ void *operator new(size_t s) {
+ return User::operator new(s, 0);
+ }
public:
/// get() - Static factory methods - Return objects of the specified value
+ static ConstantFP *get(const APFloat &V);
+
+ /// get() - This returns a constant fp for the specified value in the
+ /// specified type. This should only be used for simple constant values like
+ /// 2.0/1.0 etc, that are known-valid both as double and as the target format.
static ConstantFP *get(const Type *Ty, double V);
/// isValueValidForType - return true if Ty is big enough to represent V.
- static bool isValueValidForType(const Type *Ty, double V);
- inline double getValue() const { return Val; }
+ static bool isValueValidForType(const Type *Ty, const APFloat& V);
+ inline const APFloat& getValueAPF() const { return Val; }
/// isNullValue - Return true if this is the value that would be returned by
/// getNullValue. Don't depend on == for doubles to tell us it's zero, it
/// considers -0.0 to be null as well as 0.0. :(
virtual bool isNullValue() const;
+ // Get a negative zero.
+ static ConstantFP *getNegativeZero(const Type* Ty);
+
/// isExactlyValue - We don't rely on operator== working on double values, as
/// it returns true for things that are clearly not equal, like -0.0 and 0.0.
/// As such, this method can be used to do an exact bit-for-bit comparison of
- /// two floating point values.
- bool isExactlyValue(double V) const;
-
+ /// two floating point values. The version with a double operand is retained
+ /// because it's so convenient to write isExactlyValue(2.0), but please use
+ /// it only for simple constants.
+ bool isExactlyValue(const APFloat& V) const;
+
+ bool isExactlyValue(double V) const {
+ bool ignored;
+ // convert is not supported on this type
+ if (&Val.getSemantics() == &APFloat::PPCDoubleDouble)
+ return false;
+ APFloat FV(V);
+ FV.convert(Val.getSemantics(), APFloat::rmNearestTiesToEven, &ignored);
+ return isExactlyValue(FV);
+ }
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantFP *) { return true; }
static bool classof(const Value *V) {
///
class ConstantAggregateZero : public Constant {
friend struct ConstantCreator<ConstantAggregateZero, Type, char>;
+ void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
ConstantAggregateZero(const ConstantAggregateZero &); // DO NOT IMPLEMENT
protected:
- explicit ConstantAggregateZero(const Type *Ty)
- : Constant(Ty, ConstantAggregateZeroVal, 0, 0) {}
+ explicit ConstantAggregateZero(const Type *ty)
+ : Constant(ty, ConstantAggregateZeroVal, 0, 0) {}
+protected:
+ // allocate space for exactly zero operands
+ void *operator new(size_t s) {
+ return User::operator new(s, 0);
+ }
public:
/// get() - static factory method for creating a null aggregate. It is
/// illegal to call this method with a non-aggregate type.
- static Constant *get(const Type *Ty);
+ static ConstantAggregateZero *get(const Type *Ty);
/// isNullValue - Return true if this is the value that would be returned by
/// getNullValue.
ConstantArray(const ConstantArray &); // DO NOT IMPLEMENT
protected:
ConstantArray(const ArrayType *T, const std::vector<Constant*> &Val);
- ~ConstantArray();
public:
/// get() - Static factory methods - Return objects of the specified value
static Constant *get(const ArrayType *T, const std::vector<Constant*> &);
/// null termination.
static Constant *get(const std::string &Initializer, bool AddNull = true);
+ /// Transparently provide more efficient getOperand methods.
+ DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant);
+
/// getType - Specialize the getType() method to always return an ArrayType,
/// which reduces the amount of casting needed in parts of the compiler.
///
return reinterpret_cast<const ArrayType*>(Value::getType());
}
- /// isString - This method returns true if the array is an array of sbyte or
- /// ubyte, and if the elements of the array are all ConstantInt's.
+ /// isString - This method returns true if the array is an array of i8 and
+ /// the elements of the array are all ConstantInt's.
bool isString() const;
/// isCString - This method returns true if the array is a string (see
+ /// @verbatim
/// isString) and it ends in a null byte \0 and does not contains any other
+ /// @endverbatim
/// null bytes except its terminator.
bool isCString() const;
}
};
+template <>
+struct OperandTraits<ConstantArray> : VariadicOperandTraits<> {
+};
+
+DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(ConstantArray, Constant)
//===----------------------------------------------------------------------===//
// ConstantStruct - Constant Struct Declarations
ConstantStruct(const ConstantStruct &); // DO NOT IMPLEMENT
protected:
ConstantStruct(const StructType *T, const std::vector<Constant*> &Val);
- ~ConstantStruct();
public:
/// get() - Static factory methods - Return objects of the specified value
///
return get(std::vector<Constant*>(Vals, Vals+NumVals), Packed);
}
+ /// Transparently provide more efficient getOperand methods.
+ DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant);
+
/// getType() specialization - Reduce amount of casting...
///
inline const StructType *getType() const {
}
};
+template <>
+struct OperandTraits<ConstantStruct> : VariadicOperandTraits<> {
+};
+
+DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(ConstantStruct, Constant)
+
//===----------------------------------------------------------------------===//
/// ConstantVector - Constant Vector Declarations
///
ConstantVector(const ConstantVector &); // DO NOT IMPLEMENT
protected:
ConstantVector(const VectorType *T, const std::vector<Constant*> &Val);
- ~ConstantVector();
public:
/// get() - Static factory methods - Return objects of the specified value
static Constant *get(const VectorType *T, const std::vector<Constant*> &);
return get(std::vector<Constant*>(Vals, Vals+NumVals));
}
+ /// Transparently provide more efficient getOperand methods.
+ DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant);
+
/// getType - Specialize the getType() method to always return a VectorType,
/// which reduces the amount of casting needed in parts of the compiler.
///
/// @brief Determine if the value is all ones.
bool isAllOnesValue() const;
+ /// getSplatValue - If this is a splat constant, meaning that all of the
+ /// elements have the same value, return that value. Otherwise return NULL.
+ Constant *getSplatValue();
+
virtual void destroyConstant();
virtual void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U);
}
};
+template <>
+struct OperandTraits<ConstantVector> : VariadicOperandTraits<> {
+};
+
+DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(ConstantVector, Constant)
+
//===----------------------------------------------------------------------===//
/// ConstantPointerNull - a constant pointer value that points to null
///
class ConstantPointerNull : public Constant {
friend struct ConstantCreator<ConstantPointerNull, PointerType, char>;
+ void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
ConstantPointerNull(const ConstantPointerNull &); // DO NOT IMPLEMENT
protected:
explicit ConstantPointerNull(const PointerType *T)
: Constant(reinterpret_cast<const Type*>(T),
Value::ConstantPointerNullVal, 0, 0) {}
+protected:
+ // allocate space for exactly zero operands
+ void *operator new(size_t s) {
+ return User::operator new(s, 0);
+ }
public:
-
/// get() - Static factory methods - Return objects of the specified value
static ConstantPointerNull *get(const PointerType *T);
friend struct ConvertConstantType<ConstantExpr, Type>;
protected:
- ConstantExpr(const Type *Ty, unsigned Opcode, Use *Ops, unsigned NumOps)
- : Constant(Ty, ConstantExprVal, Ops, NumOps) {
+ ConstantExpr(const Type *ty, unsigned Opcode, Use *Ops, unsigned NumOps)
+ : Constant(ty, ConstantExprVal, Ops, NumOps) {
// Operation type (an Instruction opcode) is stored as the SubclassData.
SubclassData = Opcode;
}
// ConstantExprs in intermediate forms.
static Constant *getTy(const Type *Ty, unsigned Opcode,
Constant *C1, Constant *C2);
- static Constant *getCompareTy(unsigned short pred, Constant *C1,
+ static Constant *getCompareTy(unsigned short pred, Constant *C1,
Constant *C2);
static Constant *getSelectTy(const Type *Ty,
Constant *C1, Constant *C2, Constant *C3);
Constant *Elt, Constant *Idx);
static Constant *getShuffleVectorTy(const Type *Ty, Constant *V1,
Constant *V2, Constant *Mask);
+ static Constant *getExtractValueTy(const Type *Ty, Constant *Agg,
+ const unsigned *Idxs, unsigned NumIdxs);
+ static Constant *getInsertValueTy(const Type *Ty, Constant *Agg,
+ Constant *Val,
+ const unsigned *Idxs, unsigned NumIdxs);
public:
// Static methods to construct a ConstantExpr of different kinds. Note that
static Constant *getIntToPtr(Constant *C, const Type *Ty);
static Constant *getBitCast (Constant *C, const Type *Ty);
+ /// Transparently provide more efficient getOperand methods.
+ DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant);
+
// @brief Convenience function for getting one of the casting operations
// using a CastOps opcode.
static Constant *getCast(
/// @brief Return true if this is a compare constant expression
bool isCompare() const;
+ /// @brief Return true if this is an insertvalue or extractvalue expression,
+ /// and the getIndices() method may be used.
+ bool hasIndices() const;
+
/// Select constant expr
///
static Constant *getSelect(Constant *C, Constant *V1, Constant *V2) {
}
/// getSizeOf constant expr - computes the size of a type in a target
- /// independent way (Note: the return type is a ULong).
+ /// independent way (Note: the return type is an i64).
///
static Constant *getSizeOf(const Type *Ty);
///
static Constant *get(unsigned Opcode, Constant *C1, Constant *C2);
- /// @brief Return an ICmp or FCmp comparison operator constant expression.
+ /// @brief Return an ICmp, FCmp, VICmp, or VFCmp comparison operator constant
+ /// expression.
static Constant *getCompare(unsigned short pred, Constant *C1, Constant *C2);
/// ConstantExpr::get* - Return some common constants without having to
static Constant *getAnd(Constant *C1, Constant *C2);
static Constant *getOr(Constant *C1, Constant *C2);
static Constant *getXor(Constant *C1, Constant *C2);
- static Constant* getICmp(unsigned short pred, Constant* LHS, Constant* RHS);
- static Constant* getFCmp(unsigned short pred, Constant* LHS, Constant* RHS);
+ static Constant *getICmp(unsigned short pred, Constant *LHS, Constant *RHS);
+ static Constant *getFCmp(unsigned short pred, Constant *LHS, Constant *RHS);
+ static Constant *getVICmp(unsigned short pred, Constant *LHS, Constant *RHS);
+ static Constant *getVFCmp(unsigned short pred, Constant *LHS, Constant *RHS);
static Constant *getShl(Constant *C1, Constant *C2);
static Constant *getLShr(Constant *C1, Constant *C2);
static Constant *getAShr(Constant *C1, Constant *C2);
static Constant *getExtractElement(Constant *Vec, Constant *Idx);
static Constant *getInsertElement(Constant *Vec, Constant *Elt,Constant *Idx);
static Constant *getShuffleVector(Constant *V1, Constant *V2, Constant *Mask);
+ static Constant *getExtractValue(Constant *Agg,
+ const unsigned *IdxList, unsigned NumIdx);
+ static Constant *getInsertValue(Constant *Agg, Constant *Val,
+ const unsigned *IdxList, unsigned NumIdx);
/// Floating point negation must be implemented with f(x) = -0.0 - x. This
/// method returns the negative zero constant for floating point or vector
/// not an ICMP or FCMP constant expression.
unsigned getPredicate() const;
+ /// getIndices - Assert that this is an insertvalue or exactvalue
+ /// expression and return the list of indices.
+ const SmallVector<unsigned, 4> &getIndices() const;
+
/// getOpcodeName - Return a string representation for an opcode.
const char *getOpcodeName() const;
/// getWithOperands - This returns the current constant expression with the
/// operands replaced with the specified values. The specified operands must
/// match count and type with the existing ones.
- Constant *getWithOperands(const std::vector<Constant*> &Ops) const;
+ Constant *getWithOperands(const std::vector<Constant*> &Ops) const {
+ return getWithOperands(&Ops[0], (unsigned)Ops.size());
+ }
+ Constant *getWithOperands(Constant* const *Ops, unsigned NumOps) const;
virtual void destroyConstant();
virtual void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U);
- /// Override methods to provide more type information...
- inline Constant *getOperand(unsigned i) {
- return cast<Constant>(User::getOperand(i));
- }
- inline Constant *getOperand(unsigned i) const {
- return const_cast<Constant*>(cast<Constant>(User::getOperand(i)));
- }
-
-
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantExpr *) { return true; }
static inline bool classof(const Value *V) {
}
};
+template <>
+struct OperandTraits<ConstantExpr> : VariadicOperandTraits<1> {
+};
+
+DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(ConstantExpr, Constant)
//===----------------------------------------------------------------------===//
/// UndefValue - 'undef' values are things that do not have specified contents.
///
class UndefValue : public Constant {
friend struct ConstantCreator<UndefValue, Type, char>;
+ void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
UndefValue(const UndefValue &); // DO NOT IMPLEMENT
protected:
explicit UndefValue(const Type *T) : Constant(T, UndefValueVal, 0, 0) {}
+protected:
+ // allocate space for exactly zero operands
+ void *operator new(size_t s) {
+ return User::operator new(s, 0);
+ }
public:
/// get() - Static factory methods - Return an 'undef' object of the specified
/// type.
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